Exposure
- ID
- GRAVI.2025-10-28T05:55:40.197_2
- Header ID
- GRAVI.2025-10-28T05:55:40.197
- Date updated
- 2025-10-28 06:10:39 UTC+0000
- Release date
- 2026-10-28 06:10:39 UTC+0000
- UTC Start
- 2025-10-28 05:55:40.197
- UTC End
- 2025-10-28 06:01:40.197
- MJD Start
- 60976.24699302
- MJD End
- 60976.25115968667
- Exposure time (s)
- 360.0
- Validation level
- 1
- Tau 0: Coherence time (s)
- 0.0070385
- Ambient temperature (°C)
- 10.25
- Seeing (arcsec)
- 0.4
Observation
- ID
- 70875
- Category
- science
- Program ID
- 116.28NC.001
- Program Title
- GRAVITY-GAIA DR4 EXOPLANET SURVEY IN NEARBY LOW-MASS BINARY SYSTEMS
- Program Type
- Normal
- PI / COI
- KERVELLA / GALLENNE / ARENOU / BEICHMAN / BOURDAROT / LACOUR / MENDEZ / MÉRAND / NOWAK
Target
- ID
- 52587
- Name
- HD_4391_B
- RA
- 11.434829166666665
- DEC
- -47.549100555555555
Instrument
- Interferometer
- VLTI
- Instrument
- GRAVITY_FT
- Instrument mode
- LOW
- Instrument sub-mode
- DUAL
- Stations
- A0 G1 J2 K0
Projected baselines
| Baseline | Length start | Length end | Angle start | Angle end |
|---|---|---|---|---|
| A0-G1 | 88.3800 | 88.1840 | 147.5000 | 148.9000 |
| A0-J2 | 115.8430 | 114.9940 | 127.7000 | 129.2000 |
| A0-K0 | 103.0900 | 101.7110 | 104.9400 | 106.3180 |
| G1-J2 | 44.3080 | 43.5980 | 85.2000 | 86.3000 |
| G1-K0 | 70.8120 | 70.0290 | 47.3820 | 47.9640 |
| J2-K0 | 44.9750 | 44.9110 | 10.1860 | 10.9130 |
Header: used keywords
| Key | Value |
|---|---|
| HIERARCH ESO OBS PROG ID | 116.28NC.001 |
| HIERARCH ESO DPR CATG | SCIENCE |
| HIERARCH ESO DPR TYPE | OBJECT,DUAL |
| MJD-OBS | 60976.24699302 |
| HIERARCH ESO DPR TECH | INTERFEROMETRY,WOLLASTON |
| HIERARCH ESO OBS TARG NAME | HD 4391 B |
| HIERARCH ESO INS SOBJ NAME | HD_4391_B |
| RA | 11.432931 |
| DEC | -47.54846 |
| HIERARCH ESO INS SPEC RES | MEDIUM |
| HIERARCH ESO INS POLA MODE | SPLIT |
| HIERARCH ESO ISS CONF NTEL | 4 |
| HIERARCH ESO ISS CONF STATION1 | A0 |
| HIERARCH ESO ISS CONF STATION2 | G1 |
| HIERARCH ESO ISS CONF STATION3 | J2 |
| HIERARCH ESO ISS CONF STATION4 | K0 |
| EXPTIME | 377.0 |
| HIERARCH ESO DET2 SEQ1 DIT | 30.0 |
| HIERARCH ESO DET2 NDIT | 12 |
| HIERARCH ESO ISS PBL12 START | 88.38 |
| HIERARCH ESO ISS PBL12 END | 88.184 |
| HIERARCH ESO ISS PBLA12 START | 147.5 |
| HIERARCH ESO ISS PBLA12 END | 148.9 |
| HIERARCH ESO ISS PBL13 START | 115.843 |
| HIERARCH ESO ISS PBL13 END | 114.994 |
| HIERARCH ESO ISS PBLA13 START | 127.7 |
| HIERARCH ESO ISS PBLA13 END | 129.2 |
| HIERARCH ESO ISS PBL14 START | 103.09 |
| HIERARCH ESO ISS PBL14 END | 101.711 |
| HIERARCH ESO ISS PBLA14 START | 104.94 |
| HIERARCH ESO ISS PBLA14 END | 106.318 |
| HIERARCH ESO ISS PBL23 START | 44.308 |
| HIERARCH ESO ISS PBL23 END | 43.598 |
| HIERARCH ESO ISS PBLA23 START | 85.2 |
| HIERARCH ESO ISS PBLA23 END | 86.3 |
| HIERARCH ESO ISS PBL24 START | 70.812 |
| HIERARCH ESO ISS PBL24 END | 70.029 |
| HIERARCH ESO ISS PBLA24 START | 47.382 |
| HIERARCH ESO ISS PBLA24 END | 47.964 |
| HIERARCH ESO ISS PBL34 START | 44.975 |
| HIERARCH ESO ISS PBL34 END | 44.911 |
| HIERARCH ESO ISS PBLA34 START | 10.186 |
| HIERARCH ESO ISS PBLA34 END | 10.913 |
| HIERARCH ESO ISS AMBI TAU0 START | 0.007545 |
| HIERARCH ESO ISS AMBI TAU0 END | 0.006532 |
| HIERARCH ESO ISS AMBI TEMP | 10.25 |
| HIERARCH ESO ISS AMBI FWHM START | 0.38 |
| HIERARCH ESO ISS AMBI FWHM END | 0.42 |
| HIERARCH ESO FT ROBJ NAME | HD_4391_B |
| HIERARCH ESO FT ROBJ ALPHA | 004544.359 |
| HIERARCH ESO FT ROBJ DELTA | -473256.762 |